arduus: all forms
arduus means “steep, high, lofty; difficult”. Below is its full declension in Latin.
Positive
Positive, singular | Masculine | Feminine | Neuter | Forms |
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| Nominative | arduus | ardua | arduum | |
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| Genitive | ardui | arduae | ardui | |
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| Dative | arduo | arduae | arduo | |
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| Accusative | arduum | arduam | arduum | |
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| Ablative | arduo | ardua | arduo | |
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| Vocative | ardue | ardua | arduum | |
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Positive, plural | Masculine | Feminine | Neuter | Forms |
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| Nominative | ardui | arduae | ardua | |
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| Genitive | arduorum | arduarum | arduorum | |
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| Dative | | | | arduis |
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| Accusative | arduos | arduas | ardua | |
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| Ablative | | | | arduis |
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| Vocative | ardui | arduae | ardua | |
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Comparative
Comparative, singular | Neuter | Forms |
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| Nominative | arduius | arduior |
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| Genitive | arduioris | arduioris |
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| Dative | | arduiori |
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| Accusative | arduius | arduiorem |
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| Ablative | | arduiore · arduiori |
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| Vocative | arduius | arduior |
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Comparative, plural | Neuter | Forms |
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| Nominative | arduiora | arduiores |
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| Genitive | | arduiorum |
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| Dative | | arduioribus |
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| Accusative | arduiora | arduiores |
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| Ablative | | arduioribus |
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| Vocative | arduiora | arduiores |
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Superlative
Superlative, singular | Masculine | Feminine | Neuter | Forms |
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| Nominative | arduissimus | arduissima | arduissimum | |
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| Genitive | arduissimi | arduissimae | arduissimi | |
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| Dative | arduissimo | arduissimae | arduissimo | |
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| Accusative | arduissimum | arduissimam | arduissimum | |
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| Ablative | arduissimo | arduissima | arduissimo | |
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| Vocative | arduissime | arduissima | arduissimum | |
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Superlative, plural | Masculine | Feminine | Neuter | Forms |
|---|
| Nominative | arduissimi | arduissimae | arduissima | |
|---|
| Genitive | arduissimorum | arduissimarum | arduissimorum | |
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| Dative | | | | arduissimis |
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| Accusative | arduissimos | arduissimas | arduissima | |
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| Ablative | | | | arduissimis |
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| Vocative | arduissimi | arduissimae | arduissima | |
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Meaning and examples of arduus
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.